HCS361 View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

HCS361

KEELOQ® Code Hopping Encoder

Microchip Technology 

HCS361

FIGURE 9-5:

VPWM FORMAT SUMMARY (MOD = 1)

WAKE-UP (TXWAK=1)

Dead Time

1st CODE WORD

Preamble Sync Encrypt Fixed

Guard Preamble Sync Encrypt

FIGURE 9-6:

VPWM WAKE-UP FORMAT (MOD=1)

TBP

1

33% Duty Cycle Wake-Up sequence 250xTE

84

Dead Time 258xTE

FIGURE 9-7:

TBP

1

VPWM PREAMBLE/HEADER FORMAT (MOD=1)

6

10

SPM=1

18xTE Preamble

SPM=0

10xTE Sync 10xTE Header Encrypted Portion

Pulse

Code Word

Fixed Code Portion

Guard

Time

FIGURE 9-8:

VPWM DATA WORD FORMAT (MOD=1)

LOGIC 0

TE

LOGIC 1

on Transition Low to High

on Transition High to Low

TBP

2XTE

LOGIC 0

TE

TBP

LOGIC 1

TE

TBP

TBP

Encrypted Data

Serial Number

VLOW

Function Code

CRC

10 0 1

101 1 10 0 1

10 0 1 10 0 1 101

Bit 0 1 2 3

28 29 30 31 32 33 34 35

56 57 58 59 60 61 62 63 64 65 66

Note: The bit values are only shown as an example.

DS40146F-page 28

© 2011 Microchip Technology Inc.

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